Paycheck Calculator — Net Pay & Tax Withholding
Calculate your exact take-home pay after federal income tax, FICA, state taxes, and pre-tax deductions like 401(k) and health insurance. Supports all 50 states and all filing statuses.
Income & Filing
≈ effective rate 9.3% (simplified)
Pre-Tax Deductions (per paycheck)
≈ $300.00 per paycheck
Post-Tax Deductions (per paycheck)
What Is the Paycheck Calculator — Net Pay & Tax Withholding?
Your paycheck is reduced by several layers of withholding before you see the net amount. Understanding each layer helps you make informed decisions about pre-tax contribution elections that can legally reduce what you owe.
- ›Federal income tax — Uses a marginal bracket system. Only the portion of income in each bracket is taxed at that rate. Your marginal rate (highest bracket you reach) is higher than your effective rate (total tax ÷ total income).
- ›FICA — Social Security (6.2%) and Medicare (1.45%) are applied before deductions to gross wages. These fund your future benefits directly.
- ›Pre-tax deductions — 401(k), health insurance, HSA, and FSA contributions reduce federal and state taxable income, making them worth significantly more than their dollar value.
- ›State taxes — Nine states have no income tax on wages. State rates for the other 41 range from roughly 3% to over 13% (California).
Formula
Federal Taxable Income
Taxable = Gross Annual − Pre-Tax Deductions − Standard Deduction
2024 Federal Tax (Single filer example)
10% on first $11,600 + 12% on $11,601–$47,150 + 22% on $47,151–$100,525 + ...
FICA Taxes
Social Security = min(Gross Annual, $168,600) × 6.2%
Medicare = Gross Annual × 1.45% + max(0, Gross − threshold) × 0.9%
Net Pay
Net = Gross − Federal − FICA − State − Pre-Tax Deductions − Post-Tax
| Component | Rate / Threshold (2024) |
|---|---|
| Standard Deduction (Single) | $14,600 |
| Standard Deduction (MFJ) | $29,200 |
| SS Tax Rate | 6.2% on wages up to $168,600 |
| Medicare Base Rate | 1.45% on all wages |
| Additional Medicare (Single) | 0.9% on wages above $200,000 |
| Additional Medicare (MFJ) | 0.9% on wages above $250,000 |
How to Use
- 1Enter gross pay: Enter your pay before any deductions. Select your pay frequency to convert to an annual figure.
- 2Choose filing status: Single, Married Filing Jointly, or Head of Household. This determines your standard deduction and tax brackets.
- 3Select your state: States with no income tax show (no income tax). Others apply a simplified effective rate.
- 4Enter 401(k) percentage: Your traditional 401(k) contribution reduces both federal and state taxable income.
- 5Add health insurance and HSA: Employer plan premiums and HSA contributions are pre-tax, reducing your taxable income.
- 6Add post-tax deductions: Roth 401(k) contributions do not reduce taxable income but grow tax-free.
- 7Press Calculate: See your full breakdown: federal, FICA, state, deductions, and net take-home per paycheck and annually.
Example Calculation
$75,000 salary, single, California, 6% 401(k), $200/mo health insurance
Annual gross: $75,000
401(k) (6%): -$4,500
Health insurance: -$2,400 (12 × $200)
Taxable income: $75,000 − $4,500 − $2,400 − $14,600 = $53,500
Federal tax: $6,617
Social Security: $4,650
Medicare: $1,088
CA state tax (≈9.3%): $5,270 (simplified)
Total deductions: ~$18,525
Net annual take-home: ~$56,475
Effective fed rate: ~11.9% · Marginal rate: 22%
The pre-tax 401(k) benefit
That 6% 401(k) contribution saves approximately $1,440 in federal + state taxes annually (at 22% federal + ~9% CA). You effectively invest $4,500 while only reducing take-home by ~$3,060. The "free return" on pre-tax contributions is your marginal tax rate.
Understanding Paycheck — Net Pay & Tax Withholding
Effective Rate vs Marginal Rate
Your marginal rate is the rate applied to your last dollar of income — the highest bracket you reach. Your effective rate is total federal tax ÷ gross income. Because the US tax system is progressive, the effective rate is always lower than the marginal rate. Someone earning $100,000 reaches the 22% bracket but pays an effective federal rate of roughly 13–14%.
Decisions about deductions and contributions should be made using your marginal rate — that's what each additional dollar of pre-tax contribution actually saves.
Maximizing Pre-Tax Deductions in 2024
- ›401(k): 2024 employee contribution limit is $23,000 ($30,500 if age 50+). Traditional contributions reduce federal and most state taxes immediately.
- ›HSA: $4,150 individual / $8,300 family limit. Triple tax advantage: pre-tax contributions, tax-free growth, tax-free withdrawals for medical expenses.
- ›FSA: $3,200 limit for healthcare FSA. Use-it-or-lose-it — plan carefully.
- ›Dependent care FSA: $5,000 limit. Reduces taxable income for qualified childcare expenses.
States With No Income Tax on Wages (2024)
Alaska, Florida, Nevada, New Hampshire (wages), South Dakota, Tennessee, Texas, Washington, and Wyoming do not tax regular wage income. Moving from a high-tax state like California (13.3% top rate) to Texas can increase take-home pay substantially — sometimes equivalent to a significant raise on the same gross salary.
Disclaimer
This calculator provides estimates for educational purposes only. State tax calculations use simplified effective rates. Actual withholding depends on your W-4 elections, supplemental wages, credits, deductions, and employer-specific payroll processing. Use IRS Tax Withholding Estimator for authoritative withholding guidance.
Frequently Asked Questions
Why is my effective tax rate lower than my marginal rate?
The US tax system is marginal — each bracket only taxes the income within that range, not all of your income.
- ›At $75,000 (single, 2024): first $11,600 taxed at 10%, next $35,550 at 12%, remainder at 22%.
- ›Marginal rate is the highest bracket you reach (22% in this example).
- ›Effective rate is total federal tax ÷ gross income — always lower than marginal rate.
- ›The common misconception: earning $1 more will not suddenly tax all your income at the higher rate.
Use your marginal rate (22%, 24%, etc.) to evaluate the value of pre-tax deductions like 401(k) — that's the actual rate each additional dollar saves.
Does a traditional 401(k) contribution reduce FICA taxes?
No — traditional 401(k) contributions reduce federal and state income tax but are not exempt from FICA.
- ›401(k) pre-tax: reduces federal + state taxable income but does NOT reduce Social Security or Medicare taxes.
- ›Health insurance (Section 125 cafeteria plan): reduces both income tax AND FICA — a bigger effective benefit.
- ›HSA via payroll deduction: also avoids FICA; HSA contributions made directly (outside payroll) do not.
- ›FSA contributions via payroll: also exempt from FICA.
This means the tax advantage of employer-sponsored health insurance and HSA contributions is slightly larger than a 401(k) contribution of the same dollar amount.
What is the Additional Medicare Tax?
An additional 0.9% Medicare surtax applies to high earners under the Affordable Care Act (IRC § 3101(b)(2)).
- ›Single / Head of Household: applies to wages above $200,000.
- ›Married Filing Jointly: applies to combined wages above $250,000.
- ›Married Filing Separately: applies above $125,000.
- ›Employers withhold automatically on wages exceeding $200,000 regardless of filing status.
If you're married and combined income exceeds $250,000 but neither spouse individually exceeds $200,000, you'll owe the surtax at filing even though no withholding occurred — plan for this.
Are state tax rates accurate?
The calculator uses simplified effective rates for states with graduated brackets. Results are approximate for middle-income earners.
- ›Flat-rate states (PA, IL, etc.): accurate — the calculator uses the published flat rate.
- ›Graduated states: uses an approximate blended effective rate; actual tax may differ.
- ›Local income taxes (NYC, Philadelphia, Detroit, etc.) are not included.
- ›State-specific deductions, credits, and filing adjustments are not modeled.
For precise figures, use your state's official tax calculator or a full tax software package. This calculator is best for comparing scenarios and estimating take-home pay directionally.
What does FICA stand for?
FICA stands for Federal Insurance Contributions Act. It funds two separate programs via two separate taxes.
- ›Social Security: 6.2% on wages up to $168,600 (2024 wage base). Above that, no SS tax.
- ›Medicare: 1.45% on all wages — no cap. Plus 0.9% Additional Medicare Tax above $200k/$250k.
- ›Employer match: your employer pays an equal 6.2% + 1.45% on your behalf — the true FICA cost is double what you see withheld.
- ›Self-employed: pay 15.3% combined (both employee and employer portions) but deduct half as a business expense.
Will this calculator work for 2025?
The calculator uses 2024 IRS parameters. Key values that adjust with inflation each year:
- ›Standard deduction: $14,600 single / $29,200 MFJ in 2024; increases modestly each year.
- ›Federal bracket thresholds: adjusted upward ~3–4% annually based on CPI.
- ›Social Security wage base: $168,600 in 2024; increases with the National Average Wage Index.
- ›HSA and 401(k) contribution limits: also inflation-adjusted annually.
The IRS announces the following year's adjustments in October. Check IRS.gov annual inflation adjustments for the latest parameters.